xref: /freebsd/sys/contrib/openzfs/config/gettext.m4 (revision 031beb4e239bfce798af17f5fe8dba8bcaf13d99) 
1# gettext.m4 serial 70 (gettext-0.20)
2dnl Copyright (C) 1995-2014, 2016, 2018 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6dnl
7dnl This file can be used in projects which are not available under
8dnl the GNU General Public License or the GNU Library General Public
9dnl License but which still want to provide support for the GNU gettext
10dnl functionality.
11dnl Please note that the actual code of the GNU gettext library is covered
12dnl by the GNU Library General Public License, and the rest of the GNU
13dnl gettext package is covered by the GNU General Public License.
14dnl They are *not* in the public domain.
15
16dnl Authors:
17dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
18dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2006, 2008-2010.
19
20dnl Macro to add for using GNU gettext.
21
22dnl Usage: AM_GNU_GETTEXT([INTLSYMBOL], [NEEDSYMBOL], [INTLDIR]).
23dnl INTLSYMBOL must be one of 'external', 'use-libtool'.
24dnl    INTLSYMBOL should be 'external' for packages other than GNU gettext, and
25dnl    'use-libtool' for the packages 'gettext-runtime' and 'gettext-tools'.
26dnl    If INTLSYMBOL is 'use-libtool', then a libtool library
27dnl    $(top_builddir)/intl/libintl.la will be created (shared and/or static,
28dnl    depending on --{enable,disable}-{shared,static} and on the presence of
29dnl    AM-DISABLE-SHARED).
30dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
31dnl    implementations (in libc or libintl) without the ngettext() function
32dnl    will be ignored.  If NEEDSYMBOL is specified and is
33dnl    'need-formatstring-macros', then GNU gettext implementations that don't
34dnl    support the ISO C 99 <inttypes.h> formatstring macros will be ignored.
35dnl INTLDIR is used to find the intl libraries.  If empty,
36dnl    the value '$(top_builddir)/intl/' is used.
37dnl
38dnl The result of the configuration is one of three cases:
39dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled
40dnl    and used.
41dnl    Catalog format: GNU --> install in $(datadir)
42dnl    Catalog extension: .mo after installation, .gmo in source tree
43dnl 2) GNU gettext has been found in the system's C library.
44dnl    Catalog format: GNU --> install in $(datadir)
45dnl    Catalog extension: .mo after installation, .gmo in source tree
46dnl 3) No internationalization, always use English msgid.
47dnl    Catalog format: none
48dnl    Catalog extension: none
49dnl If INTLSYMBOL is 'external', only cases 2 and 3 can occur.
50dnl The use of .gmo is historical (it was needed to avoid overwriting the
51dnl GNU format catalogs when building on a platform with an X/Open gettext),
52dnl but we keep it in order not to force irrelevant filename changes on the
53dnl maintainers.
54dnl
55AC_DEFUN([AM_GNU_GETTEXT],
56[
57  dnl Argument checking.
58  ifelse([$1], [], , [ifelse([$1], [external], , [ifelse([$1], [use-libtool], ,
59    [errprint([ERROR: invalid first argument to AM_GNU_GETTEXT
60])])])])
61  ifelse(ifelse([$1], [], [old])[]ifelse([$1], [no-libtool], [old]), [old],
62    [errprint([ERROR: Use of AM_GNU_GETTEXT without [external] argument is no longer supported.
63])])
64  ifelse([$2], [], , [ifelse([$2], [need-ngettext], , [ifelse([$2], [need-formatstring-macros], ,
65    [errprint([ERROR: invalid second argument to AM_GNU_GETTEXT
66])])])])
67  define([gt_included_intl],
68    ifelse([$1], [external], [no], [yes]))
69  gt_NEEDS_INIT
70  AM_GNU_GETTEXT_NEED([$2])
71
72  AC_REQUIRE([AM_PO_SUBDIRS])dnl
73  ifelse(gt_included_intl, yes, [
74    AC_REQUIRE([AM_INTL_SUBDIR])dnl
75  ])
76
77  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
78  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
79  AC_REQUIRE([AC_LIB_RPATH])
80
81  dnl Sometimes libintl requires libiconv, so first search for libiconv.
82  dnl Ideally we would do this search only after the
83  dnl      if test "$USE_NLS" = "yes"; then
84  dnl        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
85  dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT
86  dnl the configure script would need to contain the same shell code
87  dnl again, outside any 'if'. There are two solutions:
88  dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
89  dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.
90  dnl Since AC_PROVIDE_IFELSE is not documented, we avoid it.
91  ifelse(gt_included_intl, yes, , [
92    AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
93  ])
94
95  dnl Sometimes, on Mac OS X, libintl requires linking with CoreFoundation.
96  gt_INTL_MACOSX
97
98  dnl Set USE_NLS.
99  AC_REQUIRE([AM_NLS])
100
101  ifelse(gt_included_intl, yes, [
102    BUILD_INCLUDED_LIBINTL=no
103    USE_INCLUDED_LIBINTL=no
104  ])
105  LIBINTL=
106  LTLIBINTL=
107  POSUB=
108
109  dnl Add a version number to the cache macros.
110  case " $gt_needs " in
111    *" need-formatstring-macros "*) gt_api_version=3 ;;
112    *" need-ngettext "*) gt_api_version=2 ;;
113    *) gt_api_version=1 ;;
114  esac
115  gt_func_gnugettext_libc="gt_cv_func_gnugettext${gt_api_version}_libc"
116  gt_func_gnugettext_libintl="gt_cv_func_gnugettext${gt_api_version}_libintl"
117
118  dnl If we use NLS figure out what method
119  if test "$USE_NLS" = "yes"; then
120    gt_use_preinstalled_gnugettext=no
121    ifelse(gt_included_intl, yes, [
122      AC_MSG_CHECKING([whether included gettext is requested])
123      AC_ARG_WITH([included-gettext],
124        [  --with-included-gettext use the GNU gettext library included here],
125        nls_cv_force_use_gnu_gettext=$withval,
126        nls_cv_force_use_gnu_gettext=no)
127      AC_MSG_RESULT([$nls_cv_force_use_gnu_gettext])
128
129      nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
130      if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
131    ])
132        dnl User does not insist on using GNU NLS library.  Figure out what
133        dnl to use.  If GNU gettext is available we use this.  Else we have
134        dnl to fall back to GNU NLS library.
135
136        if test $gt_api_version -ge 3; then
137          gt_revision_test_code='
138#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
139#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
140#endif
141changequote(,)dnl
142typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
143changequote([,])dnl
144'
145        else
146          gt_revision_test_code=
147        fi
148        if test $gt_api_version -ge 2; then
149          gt_expression_test_code=' + * ngettext ("", "", 0)'
150        else
151          gt_expression_test_code=
152        fi
153
154        AC_CACHE_CHECK([for GNU gettext in libc], [$gt_func_gnugettext_libc],
155         [AC_LINK_IFELSE(
156            [AC_LANG_PROGRAM(
157               [[
158#include <libintl.h>
159#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
160extern int _nl_msg_cat_cntr;
161extern int *_nl_domain_bindings;
162#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_domain_bindings)
163#else
164#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
165#endif
166$gt_revision_test_code
167               ]],
168               [[
169bindtextdomain ("", "");
170return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION
171               ]])],
172            [eval "$gt_func_gnugettext_libc=yes"],
173            [eval "$gt_func_gnugettext_libc=no"])])
174
175        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
176          dnl Sometimes libintl requires libiconv, so first search for libiconv.
177          ifelse(gt_included_intl, yes, , [
178            AM_ICONV_LINK
179          ])
180          dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
181          dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
182          dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
183          dnl even if libiconv doesn't exist.
184          AC_LIB_LINKFLAGS_BODY([intl])
185          AC_CACHE_CHECK([for GNU gettext in libintl],
186            [$gt_func_gnugettext_libintl],
187           [gt_save_CPPFLAGS="$CPPFLAGS"
188            CPPFLAGS="$CPPFLAGS $INCINTL"
189            gt_save_LIBS="$LIBS"
190            LIBS="$LIBS $LIBINTL"
191            dnl Now see whether libintl exists and does not depend on libiconv.
192            AC_LINK_IFELSE(
193              [AC_LANG_PROGRAM(
194                 [[
195#include <libintl.h>
196#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
197extern int _nl_msg_cat_cntr;
198extern
199#ifdef __cplusplus
200"C"
201#endif
202const char *_nl_expand_alias (const char *);
203#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (""))
204#else
205#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
206#endif
207$gt_revision_test_code
208                 ]],
209                 [[
210bindtextdomain ("", "");
211return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION
212                 ]])],
213              [eval "$gt_func_gnugettext_libintl=yes"],
214              [eval "$gt_func_gnugettext_libintl=no"])
215            dnl Now see whether libintl exists and depends on libiconv.
216            if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then
217              LIBS="$LIBS $LIBICONV"
218              AC_LINK_IFELSE(
219                [AC_LANG_PROGRAM(
220                   [[
221#include <libintl.h>
222#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
223extern int _nl_msg_cat_cntr;
224extern
225#ifdef __cplusplus
226"C"
227#endif
228const char *_nl_expand_alias (const char *);
229#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (""))
230#else
231#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
232#endif
233$gt_revision_test_code
234                   ]],
235                   [[
236bindtextdomain ("", "");
237return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION
238                   ]])],
239                [LIBINTL="$LIBINTL $LIBICONV"
240                 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
241                 eval "$gt_func_gnugettext_libintl=yes"
242                ])
243            fi
244            CPPFLAGS="$gt_save_CPPFLAGS"
245            LIBS="$gt_save_LIBS"])
246        fi
247
248        dnl If an already present or preinstalled GNU gettext() is found,
249        dnl use it.  But if this macro is used in GNU gettext, and GNU
250        dnl gettext is already preinstalled in libintl, we update this
251        dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
252        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \
253           || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \
254                && test "$PACKAGE" != gettext-runtime \
255                && test "$PACKAGE" != gettext-tools; }; then
256          gt_use_preinstalled_gnugettext=yes
257        else
258          dnl Reset the values set by searching for libintl.
259          LIBINTL=
260          LTLIBINTL=
261          INCINTL=
262        fi
263
264    ifelse(gt_included_intl, yes, [
265        if test "$gt_use_preinstalled_gnugettext" != "yes"; then
266          dnl GNU gettext is not found in the C library.
267          dnl Fall back on included GNU gettext library.
268          nls_cv_use_gnu_gettext=yes
269        fi
270      fi
271
272      if test "$nls_cv_use_gnu_gettext" = "yes"; then
273        dnl Mark actions used to generate GNU NLS library.
274        BUILD_INCLUDED_LIBINTL=yes
275        USE_INCLUDED_LIBINTL=yes
276        LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.la $LIBICONV $LIBTHREAD"
277        LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.la $LTLIBICONV $LTLIBTHREAD"
278        LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
279      fi
280
281      CATOBJEXT=
282      if test "$gt_use_preinstalled_gnugettext" = "yes" \
283         || test "$nls_cv_use_gnu_gettext" = "yes"; then
284        dnl Mark actions to use GNU gettext tools.
285        CATOBJEXT=.gmo
286      fi
287    ])
288
289    if test -n "$INTL_MACOSX_LIBS"; then
290      if test "$gt_use_preinstalled_gnugettext" = "yes" \
291         || test "$nls_cv_use_gnu_gettext" = "yes"; then
292        dnl Some extra flags are needed during linking.
293        LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
294        LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
295      fi
296    fi
297
298    if test "$gt_use_preinstalled_gnugettext" = "yes" \
299       || test "$nls_cv_use_gnu_gettext" = "yes"; then
300      AC_DEFINE([ENABLE_NLS], [1],
301        [Define to 1 if translation of program messages to the user's native language
302   is requested.])
303    else
304      USE_NLS=no
305    fi
306  fi
307
308  AC_MSG_CHECKING([whether to use NLS])
309  AC_MSG_RESULT([$USE_NLS])
310  if test "$USE_NLS" = "yes"; then
311    AC_MSG_CHECKING([where the gettext function comes from])
312    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
313      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
314        gt_source="external libintl"
315      else
316        gt_source="libc"
317      fi
318    else
319      gt_source="included intl directory"
320    fi
321    AC_MSG_RESULT([$gt_source])
322  fi
323
324  if test "$USE_NLS" = "yes"; then
325
326    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
327      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
328        AC_MSG_CHECKING([how to link with libintl])
329        AC_MSG_RESULT([$LIBINTL])
330        AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
331      fi
332
333      dnl For backward compatibility. Some packages may be using this.
334      AC_DEFINE([HAVE_GETTEXT], [1],
335       [Define if the GNU gettext() function is already present or preinstalled.])
336      AC_DEFINE([HAVE_DCGETTEXT], [1],
337       [Define if the GNU dcgettext() function is already present or preinstalled.])
338    fi
339
340    dnl We need to process the po/ directory.
341    POSUB=po
342  fi
343
344  ifelse(gt_included_intl, yes, [
345    dnl In GNU gettext we have to set BUILD_INCLUDED_LIBINTL to 'yes'
346    dnl because some of the testsuite requires it.
347    BUILD_INCLUDED_LIBINTL=yes
348
349    dnl Make all variables we use known to autoconf.
350    AC_SUBST([BUILD_INCLUDED_LIBINTL])
351    AC_SUBST([USE_INCLUDED_LIBINTL])
352    AC_SUBST([CATOBJEXT])
353  ])
354
355  dnl For backward compatibility. Some Makefiles may be using this.
356  INTLLIBS="$LIBINTL"
357  AC_SUBST([INTLLIBS])
358
359  dnl Make all documented variables known to autoconf.
360  AC_SUBST([LIBINTL])
361  AC_SUBST([LTLIBINTL])
362  AC_SUBST([POSUB])
363])
364
365
366dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.
367m4_define([gt_NEEDS_INIT],
368[
369  m4_divert_text([DEFAULTS], [gt_needs=])
370  m4_define([gt_NEEDS_INIT], [])
371])
372
373
374dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
375AC_DEFUN([AM_GNU_GETTEXT_NEED],
376[
377  m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])
378])
379
380
381dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
382AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])
383
384
385dnl Usage: AM_GNU_GETTEXT_REQUIRE_VERSION([gettext-version])
386AC_DEFUN([AM_GNU_GETTEXT_REQUIRE_VERSION], [])
387